When is a plug-in hybrid not among the most green and baby-squirrel-friendly options out there? When there’s a version of that same plug-in hybrid that doesn’t require being plugged into a dirty, coal-powered wall outlet. Witness Ford’s C-Max Solar Energi concept, which is pretty much a C-Max Energi—the plug-in variant of the C-Max hybrid—with a solar-powered charging apparatus for its battery pack. The C-Max Solar Energi debuts at the tech-intensive 2014 Consumer Electronics Show in Las Vegas, and it’s being considered for production.READ MORE ››